RU2325018C1 - Spiral-dipole symmetric antenna "ravel-c" - Google Patents

Abstract

FIELD: antenna engineering.

SUBSTANCE: spiral-dipole symmetric antenna consists of two spiral dipoles, combined with symmetric matching elements designed as spiral matching bend and feeder looking like cable with braided screen. All antenna spirals look like return loop, antenna feeder is connected to dipoles by means of straight portion and forms spiral in area located lower than horizontal plane going through cable input point. Spiral is plane-shaped with odd number of bends. Central cable core after specified bends is connected to second spiral dipole as isolated conductor. Spiral of conductor within area located above horizontal area going through cable input point is designed as plane-shaped with odd number of bends. Adjacent bend portions are shifted to odd number of rotation. After conductor returns to feeder input area wire forms third plane spiral by means of cable winding to spiral located lower than horizontal plane. Free output portion of conductor is electrically connected to braided screen.

EFFECT: antenna full internal matching, input resistance stability, emitter symmetry, as well as removal of all-band antenna resonance and reduction of influence of surrounding objects.

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Description

The invention relates to the field of radio engineering, in particular to communications, mainly to spiral antennas meter and decimeter ranges of transceivers.

From the information publicly available prior to the priority date of the claimed technical solution, the means of the same purpose are known.

Known spiral-symmetrical symmetric antenna containing two spiral vibrators combined with balancing-matching elements made in the form of spiral matching elbows and interconnected, a feeder in the form of a cable with a shielding braid and a feeder feed zone (see, for example, RF patent No. 2054764 MKI H01Q 7/00, 1991). This device is the closest to the claimed and therefore taken as a prototype.

The use of this device does not allow to obtain the specified technical result due to a significant effect on the emissivity of the antenna of surrounding objects.

The difference between the patented antenna and linear vibrators is that the patented antenna does not require additional devices, such as a U-elbow, to provide symmetrical connection. To receive horizontally polarized waves, the plane formed by the antenna directors is placed horizontally (parallel to the ground), vertically polarized waves - vertically. The invention is aimed at obtaining a technical result: achieving full internal coordination of the antenna; stability of the input impedance of the antenna; symmetry of emitters; the exclusion of unreliable symmetrizing devices such as the U-elbow; elimination of out-of-band resonances of the antenna; reducing the influence of surrounding objects on the emissivity of the antenna.

The following are general and particular significant features characterizing the causal relationship of the invention with the specified technical result.

Spiral-vibrational symmetric antenna, containing two spiral vibrators combined with balancing-matching elements made in the form of spiral matching knees, and interconnected, a feeder in the form of a cable with a shielding braid and a feeder feed zone. The spirals are made in the form of return loops, the antenna feeder is fed to the vibrators using a straight section of length L1 = (λ / 4) ... (λ / 12), which forms a spiral on a section of length L5 = (λ / 2) ... ( λ / 6) with a step L3 = (λ / 28) ... (λ / 36) in zone C, located below the horizontal plane passing through the cable entry point, while the spiral has a flat shape with an odd number of bend sections, the central core cable after these kinks is attached to the second spiral vibrator in the form of an insulated conductor, the spiral conductor in zone B, p the horizontal plane lying above the cable entry point is flat on the length L4 = (λ / 2) ... (λ / 6) with an odd number of bend sections of size L2 = (λ / 28) ... (λ / 36 ), and adjacent sections of the inflection are turned relative to each other by an odd number of revolutions, the part of the conductor returning to the feeder supply zone forms a third flat spiral in zone C with a step (λ / 60) ... (λ / 68), by winding it on cable spiral, while the free output part of the conductor is electrically connected to the shielding braid of the free end of cable.

The technical result achieved in all cases of the implementation of the object is ensured by the following set of new, distinctive features.

The spirals are made in the form of return loops, the antenna feeder is fed to the vibrators using a straight section of length L1 = (λ / 4) ... (λ / 12), which forms a spiral on a section of length L5 = (λ / 2) ... ( λ / 6) with a step L3 = (λ / 28) ... (λ / 36) in zone C, located below the horizontal plane passing through the cable entry point, while the spiral has a flat shape with an odd number of bend sections, the central core cable after these kinks is attached to the second spiral vibrator in the form of an insulated conductor, the spiral conductor in zone B, p the horizontal plane lying above the cable entry point is flat on the length L4 = (λ / 2) ... (λ / 6) with an odd number of bend sections of size L2 = (λ / 28) ... (λ / 36 ), and adjacent sections of the inflection are turned relative to each other by an odd number of revolutions, the part of the conductor returning to the feeder supply zone forms a third flat spiral in zone C with a step (λ / 60) ... (λ / 68), by winding it on cable spiral, while the free output part of the conductor is electrically connected to the shielding braid of the free end of cable.

Figure 1 presents a General view of the antenna; figure 2 - node I in figure 1

Spiral-vibratory symmetric antenna consists of two spiral vibrators 1 and 2. combined with balancing-matching elements, made in the form of spiral matching knees, and interconnected. All spirals are made in the form of return loops. Feeder 3 - in the form of a cable with a shielding braid in the feed area of the feeder (zone A). Antenna feeder 3 is fed to the vibrators using a straight section of length L1 = (λ / 4) ... (λ / 12), which forms a spiral 4 in a section of length L5 = (λ / 2) ... (λ / 6) s step L3 = (λ / 28) ... (λ / 6) in zone C, located below the horizontal plane passing through the cable entry point, while the spiral 4 has a flat shape with an odd number of bend sections, the central core 5 (Fig. 2 ) of the cable 3 after the indicated bends is connected to the second spiral vibrator 2 in the form of an insulated conductor, the spiral 6 of the conductor in zone B located horizontally above of the plane passing through the cable entry point is made flat on the length L4 = (λ / 2) ... (λ / 6) with an odd number of inflection sections of size L2 = (λ / 28) ... (λ / 36), moreover, the adjacent sections of the bend are rotated relative to each other by an odd number of revolutions, the return part of the conductor to zone A of the feeder feed forms in zone C a third flat spiral 7 with a step (λ / 60) ... (λ / 68), by winding it on the spiral 4 of the cable 3, while the free output part of the conductor 7 is electrically connected to the shielding braid of the free end of the cable 3 (figure 2).

Comparison of the claimed technical solution with the prior art known from the scientific, technical and patent documentation as of the priority date in the main and related sections did not reveal a tool that has features identical to all the features contained in the claims proposed by the applicant, including the purpose of the application. Those. the set of essential features of the claimed solution was not previously known and is not identical to any known technical solutions, therefore, it meets the condition of patentability "novelty".

An analysis of the known technical solutions in the art showed that the proposed device does not follow explicitly from the prior art for the specialist, since solutions have not been identified that have features that match the distinguishing features of the invention and the influence of the distinctive features on the technical result indicated in the application materials is not confirmed. . Those. the claimed solution has features that are absent in the known technical solutions, and their use in the claimed combination of essential features makes it possible to obtain a new technical effect, therefore, the proposed technical solution can only be obtained through a creative approach and is not obvious to the average specialist in this field, t. e. has an inventive step in comparison with the existing level of technology.

The claimed technical solution is industrially applicable, since it can be manufactured industrially in radio engineering and used in other areas of the national economy, efficient, feasible and reproducible.

The device works and is used in various operating conditions, since the fixing elements of the antenna can be different. For example, an antenna can be used as hidden on the human body. In a typical embodiment, the antenna may have a T-shape made of plastic pipe, etc.

The technical effect of the use of this invention is to reduce the influence of surrounding objects on the emissivity of the antenna, achieving full internal coordination of the antenna, the stability of the input impedance of the antenna, which is the main advantage of the claimed antenna in comparison with the known technical solutions.

Claims (1)

Spiral-vibrational symmetric antenna, containing two spiral vibrators combined with balancing-matching elements made in the form of spiral matching knees, and interconnected, a feeder in the form of a cable with a shielding braid and a feeder feed zone, characterized in that the spirals are made in the form return loops, the antenna feeder is fed to the vibrators using a straight section of length L1 = (λ / 4) ... (λ / 12), which forms a spiral in a section of length L5 = (λ / 2) ... (λ / 6) with a step L3 = (λ / 28) ... (λ / 36) in zone C, located below the mountain the horizontal plane passing through the cable entry point, while the spiral has a flat shape with an odd number of bend sections, the central core of the cable after these bends is attached to the second spiral vibrator in the form of an insulated conductor, the spiral conductor in zone B located above the horizontal plane passing through the cable entry point is made flat on the length L4 = (λ / 2) ... (λ / 6) with an odd number of bend sections of size L2 = (λ / 28) ... (λ / 36), and the adjacent bend sections are rotated relative to against each other at an odd number of revolutions, the part of the conductor returning to the feeder supply zone forms a third flat spiral in zone C with a step (λ / 60) ... (λ / 68), by winding onto the cable spiral located there, with a free exit part of the conductor is electrically connected to the shielding braid of the free end of the cable.

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